Oil-burning device



H. E.' LAKE OIL BURNINGA DEVICE Filed Jang 24, 1924 e sheets-sheet je H;E. LAKE 911; BURNING DEVICE 4p s sh'gs-sheet 's Patented Nov'. 23,1926.'

UNITED lSTMES l, 1,608,027 PATENT OFFICE.

HARRY E. LAEE, or BOSTON, MASSACHUSETTS, ASSIGNOE To LAKE OIL EURNING.COMPANY, A CORPORATION or `:ilnssAcHUSETTS..

i' OIL-BURNING DEVICE.

Application :filed January 2 4, 1924. A Serial No. 688,295.

My invention relates' to that type of device particularly adapted forburning crude,`

or heavy oil Whereirnpa spinner'cup, so called, is'employedl tomconvertthe HOW of oil into 'a thin lihn and project the film into a blast ofairor steam which will atomize the' Oil so that it may burn' freely. It hasbeen the special object of my invention I to provide an improved form ofspinnercup which shall more effectively assist in in Fig. 1 iviththebracket, fan and oil distributing part-s shown in cross-section.

Fig. 3 shows inlongitudinal cross-section.

an enlarged view .of the spinner cup and oil nozzle,

Fig.4 is a cross-section on line"4,'4 of Fig. 3l

Fig. 5 s.

Fg.6 is a view. on Aline 6-6 of Fig. 2, viewed in the directionindicated by the y arrow. Fig. 7 is a view on line 7-7 of Fig. 2 viewedin the`direction with the bathe-plate partly cut away` to show thecurved batheis a cross-section on line 5-5 of pins attached to theforward' face of the.

baille-plate.

Fig. 8 is a view on line 8-8 of' Fig, 2 4o viewed in the directionindicated by the arrow, With the diaphragm' partly cut away to show thefan blades. Fig. 9 is'a rear view of the fan casing'and bracket. l .I

Referring noW. more speciically to the drawings 1 iS a bracket providedwith a forwardly extending base portion 2. The bracket 1 supports anvelectricv motor 3, the shaft '4 ofwhich is `in twoI parts united by aiexible coupling 5.. An enlarged portion 6 of shaft 4 separates'the rearball-bearing 7 andthe front ball-bearing 8, which bearings support thefan casing which is mounted on hubs 9 and 10 in the following de- '55scribed manner; projectingt'orwardly from the hub 9 is an imagen web 11Saa-pea like the frustrurn of a cone and provided with air inlets 12.Integrally connected with the outer edge of the periphery of Web 11 'is-the rear portion 13 of the fan casing. The

hub 10 has integral therewith an annular spider 14 Fig. 6) provided withintegral radial arms 15. This spider l14 is provided" With holes 16through which may pass screws which securethe forward portion 17 of thefan casing. The peripheries ofthe portions 13 and 17 of the fan casingare secured together by means of screws 18. An

Aouter nozzle casing l19`provid'ed With an an' nular lange 20 is alsoattached to the spider 14 by means of the same Screws which pass throughholes 16. The bottom of' the fan casingis provideduvith a lug-21 Whichmay resi! upon theextension 2 of the bracket 1. A lug 22 is cast.integral with the rear portion 13 ofthe fan casing, and a screw 22.

passing through theopposite' portion of bracket 1 and entering -lug22,securely holds the fan, motor and burner to'the Abracket 1 in a mannerwhereby they may be readily removed.

An annular air-Shutter 24 overlies the slotted-web,11. This air. shutter24 is provided With slots or openings which may 'be .brought into or outo'f egister With the slots 12 in the web 11 by revolving the air-shutter24, one. end of Whichis loosely supported on the hub 9 and the otherendof which is provided. with an annular flange 25 which lits with iirnivfrictional contact in -a groove in the rear part 13 of the fanfcasing.

The' fan is mountedA and constructed as follows; fast upon "the enlargedportion 6 of shaft 4 is a hub 26 to which .is attached analfinular-plate27 which. is fastened by means of rivets 28 to thefan-blades 29, (see Fig. 8). These fan blades 29 are formed integralwith the back late 30, the outer edge of Whichruns with s ight clearancewith reof the rear portion 13 of the fan casing.

The back plate 30 is provided with an annui lar ila-nge 32 which runswith slight clezirance with respect to a groove inthe back portion 13 ofthe fan. casing.

An annular baile-plate 33 of Asize corresponding to that of the plate 27is secured to 'curved ribs .34 b y rivets 35. 34, which are castintegral with themgfront portion 17 of the fan casing, are radiallyA Theribs passes through the disposed and their-inner ends extend as far asthe opening in the spider 14 (see Fig.

The nozzle and spinning cups for atomizing the oil are mounted 'andconstructed in the following described manner.; the hub 10 (see Fig. 2)is provided with a cylindrical cavity 3G of depth greater than thatrequired to. receive the roller bearing 8. Into this cavity 36 isclosely fitted the annular flange 3T on the end of the hub extension 38which is held in place by screws 10u. The'drive shaft 4 hub 'extension38' and has fast on the end thereof a nozzle-cap 39 which has arearwardly extending tube portion (See Fig. This rearwardly extendingtube portion 40 is provided with a multiplicity of slots 41 which areslantingly disposed as illustrated in Fig. 5. This rearwardly extendingtube portion preferably dares somewhat toward the nozzle-cap 39.Surrounding the shaft 4 is a sleeve 42 which tits tightly in the hubextension 38 at one end and at the other end enters loosely a cavity inthe nozzle cap 89.

The hub extension 38 is provided with a cylindrical cavity 43 withinwhich is mounted by a close driving tit a tube 44 which eX- tendsforward for a'considerable distance. partly underlying the slots 41 inthe tube portion 40` of the nozzle-cap 39. It. will be observed that anannular passage is formed between the sleeve 42 and the tube 44. Aninsulated oil supply pipe 45 is screwed into I a cavity in thehub-extension 38 and connects by passage 46 with the annular passage,between the sleeve 42 and the tube 44. This oil supply pipe' 45 passesthrough openings in the annular flange 4T on the spider 14 and the outernozzle casing 19.

The tube portion 40 of the nozzle-cap 39 has a flange 48 tol which isattached the outer spinner cup 49. An inner spinner cup 50 is fastmounted at its inner extremity between the outer spinner cup and thetube portion 40 of the nozzle cap 39. It will be observed from anexamination of Fig. 3 that b there isspace between the inner and outerGti spinner cups and between the inner spinner cup and the tube portion40 of the nozzlecap 39. It. will also be observed that the cups flareoutwardly, the outer cup projecting slightly beyond the inner cup. Theouter spinner cup 49 has near large openings or slots 51. A sleeve 52,pressed tightly upon the hub extension 38, loosely embraces the rearportion of the spinner cup 49. l

An annular casting 53 having a partially tapering bore7 as shown in Fig.27 may be provided to be set in the brick work of the furnace front soas to form a suitable opening through which the nozzle of my device maybe thrust to such extent as may be Adesired to allow sutlicient air toenter between the out-er nozzle casing 19 and the interior -ter 24 isadjusted so as its outer rim y of the casting 53 to give goodcombustion.

The operation of my device is as follows The motor is started, therebyrotating the fan, nozzle-cap and spinner cups, and oil is admittedthrough the pipe 45. The air shutto permit the desired, volume of air toenter the system. The fanblades 28 pass the air outward past their eX-tremities to the channel in the periphery of the fan' casing beyond theannular lip 3l. (See Fig. A2.) Thence the air passes between thebale-plate 33. and the front of the fan casing, being directed towardthe passages into the outer nozzle casing, between the arms 15 of theweb 14, by means ofthe curved ribs 34. These curved ribs 34 are designedto present a minimum of frictional resistance to the whirling body ofair passing betweenl them toward the center of the system by This hasthe incidental advantage. of reducing the objectionable noise offrictional resistance to air currents as well as minimizing resistanceto the flow of the current of air.

It will be noted from an examination of Fig. 2 that the space betweenthe fan blades 29 tapers in the cross-section therein shown because ofthe slantino' relation of the plate 30 to the plate 27. Ience as thespace between the fan blades 29 widens toward the periphery in oneplane, because of the radius disposition of the fan blades, this spacefis, narrowed in the opposite plane in a manner,

whereby the passage between each pair of fan blades maintains across-sectional area which 1s at all points substantially equal.

This uniformity results in a well balanced,

even flow of air which assists in qui-et and efficient operation of thefan.

gradually altering the course of the air 1 currents.

As the rear portion of the fan is sealed on scribed manner; a"terentering the annular passage 43 between the sleeve 42 and the tube 44,the oil flows forward into contact with the tubular extension 40 on thenozzle-cap 39. As the oil passes through the slots 41 in thetubularextensions 40 the rapid rotation of this part throws the oil outwardwith great force against the adjacent surface of the inner spinner cup50. The oil is thus spread in a thin film on the inside of the spinnercup 50 and the rapid rotation of this spinner cup causes the oil to flowoutward by centrifugal force along the liaring surface of the cup. Uponreaching the outer rim of this inner cup 50, the film of oil isprojected toward the overlying rim of the combustion.

vlilining over had taken place therein.l

outer spinner cup lll-and encountersa blastA -of the rini of the innercup 50.` A portion of the oil, however, whichi's thrown ott the riin otthe innercup 50 will encounter the A rotatingriin of the outer spinnercup 49 and will bythe centrifugal force imparted by that rim be thrownoutwardly across the partot'the blast of air issuing from betweenthatv'rini of the outer cup 49 andtheouter nozzle'l casing 19. Thisblast of aii will coniplete the atoinization of all oil which istliro'wn into the outer air to the point of Heretofore much difficultyhas been experienced in getting the oil to spread ou't'in a filmupoiithe spinner cup after an initilal ie drops of oil subsequentlyfalling .on the oil lilin tended to retain their globular shape androll? outof the cup without' becoming atoinized. This lwould result inimperfect combustion. My device,A however, throws ence .of the air blastand catching the unatoinized portion on theriin of the outer cup andagain subjecting it to the air blast,- I

further assure complete breaking up of the oil into line particles whichwill burn completely with a hot smokeless flame.

I have stated that my device is particularly designed for use with heavyoils. It may nevertheless be used, with excellent results,

' liumidiy the atomizer.

' y with lighter oils, such as kerosene. My device is also useful withwater instead-of oil in situations where it is desired to atomize waterfor humidifying purposes in' order to Having thus fully described myinvention, what Iclairnis:

1. In a'device of the characterspecitied the combination of a shaft, acasing provided with spaced bearings for rotatably Supporting the shaft,a spider at one side of said casing having a hubl provided with a cavitylto receive one of -said bearings, au extension upon said hub having atube receiving cavity, a tube mounted in the cavity about the rotatingshaft and rigidly secured to the extension, a'sleeve secured in thecavity about .saidv .tube to form an oil` passage between the tube andsleeve, an oil .inlet for delivering oil to the passage thru a Wall ofsdsleeve, Ia nozzle-cap' secured to said shaft to, be rotated, andhaving a tubu- 1 lar portion tliat'surrounds and extends rear,-

wardly a substantial distance over said sleeve, said rearwardlyextending portion being provided ,with elongated slots, and aspinner-cup mounted onsaid rearwardly extending 'portion and surroundingthe nozzlecap.

2. In .a device of the' character specied the combination of a fancasing, a shu'ftlp Aa spider at the opposite sideof said casing.

an extension secured to the hub ofithe spider and haviiiga tubereceiving cavity, a tube mounted in the cavity about the shaft andrigidly 'secured to the extension, a sleeve secured in the cavity, aboutsaid tube to forni an'oil passage between the tube and sleeve,l

an oilinlet for delivering oil to the passage thru a wall of saidsleeve, a nozzle-cap secured to said sliaftftopbe rotated thereby .and

having a tubular portion that surrounds and extendsjrearwardly asubstantial dist-ance over said sleeve, slots formed in said rearwardlyextending tubular portion, and a spinner-cup mounted on said rearwardlyextending portion and suri'oundii'ig'z'the nozzle- Cap;

3. In a device of the character speciiied the combination of a shaft, astationary member Within which said shaft is rotatably `mounted, saidstationary member being provided With a tube receiving cavity, a sleeveclosely surrounding said shaft land passing through said cavity whichsleeve is fixed to said'stationary -member, a tube mounted Within saidcavity in a manner whereby thereis formed an 'annular oil passagebetween sald sleeve and said tube, an oil inlet entering the passagethrough .a wall of said tube, a nozzle-ca fast mounted on the rextre ityon said .s aft said nozzle-cap having ya tu ular extension overlyingsaid sleeve and said tube and ,forming an extension of :sai-d passageover the tube,.said tubular extension being provided with slots .formeded on Athe extension'of the nozzle cap and surrounding the nozzle capsaid spinner cup Vthrough its walls, and a spinner cup mountrevolvingwith said shaft, being of substan'- tially frusto-conical forni,enlarging toward its outer end and the inner sui-face thereof beingsupplied with oil through the slots of the said tubular extension of thenozzle cap. LA burner of the class described,'com

prising a. nozzle cap arranged and mounted.125

for rotation and provided with peripheral openings, means to supply oilto the interiorv of the nozzle cap todae thrown out centrifugally by therotation of said nozzle cap, an inner spinner cup surrounding saidnozzle `cap and the interior surface of which is supplied with oilthereby, anouter spinner cup spaced from the inner spinner cup tofornian annular passage therebetween, said outerI spinner cup havingperipheral openings and said spinner cups being arranged to rotate withsaid shaft, a fan, and an outwardly contracting outer nozzle throughwhich a blast of air is forced by the fan, said outer nozzle surroundingsaid outer spinner cup and spaced therefrom so that an outwardlycontracting annular passage is for-med therebetween through which andthrough said openings of the outerspinner cup the blast Aof airis forcedand discharged between the outer ends of the innerand outer spinner Aburner of the'class described, co1nprising a nozzle cap arrangedvaidmounted for rotation and provided with peripheral openings, means tosupply'oil to the interior of the nozzle cap t0 be' thrown outcentrifugally by the rotation of said nozzle cap, an inner spinner cupsurrounding said nozzle'cap and the interior surface of which issupplied with oil thereby, an outer spinner cup spaced from the innerspinner cup to form an annular passage therebetween, said outer spinnercup having peripheral openings and said spinner cups being arranged torotate with said shaft, a, fan, and an outwardly contracting outernozzle through which a blast of air is forced by the fan, saidouternozzle surrounding said outer spinner cup and spaced therefrom so thatan outwardly contracting annular passage is formed therebetween throughwhich and through saidA openings of the outer spinner cup the blast ofairis forced and discharged between the outer ends of the inner andouter spinner y cup, the length ofl said outer spinner cup exceedingthat of the inner spinner cup and its outer end projecting beyond thatof the inner spinner cup, the outer end of the outer nozzle beingarranged in close prox irnity to that of the outer spinner cup.

-6.'A burner of the class described, coniprising a nozzle cap arrangedand mounted for rotation and provided with peripheral openings, means tosup ly oil to the interior of the nozzle cap to e thrown-outcentrifugally by the rotation of said nozzle cap, an inner spinner cupsurrounding said nozzle cap and the interior surface of which issupplied withr oil thereby, an outer spinner cup spaced from the innerspinner cup to. forni an annular passage therebetween, said outerspinner cup having peripheral openings a-nd said spinner cups beingarranged to rotate with said shaft, a fan, and an outwardly contractingouter nozzle throughwhich a blast of air is forced by the fan,

`said outer nozzle surroundingsaid outer spinner cup and spacedtherefrom so that un outwardly contracting annular passage is formedtherebetween through which and through said openings of the outerspinner cup the blast of air is forced and discharged between the outerends of the inner and outer spinner-cup, the length ofsaid outer spinnercup exceeding that of theinner spinner cup and its outer end projectingbeyond that of the inner spinner cup,' the outer end of the outer nozzlebeing 4arranged in close proximity to that of the outer spinner cup, theextreme outer end of the outer spinner cup being outwardly flared.

In witness whereof I have hereunto af` fixed my signature. I'

. HARRY E. LAKE.

